Sync with HEAD.
Sync with HEAD.

 - bump the date to represent the addition of ipv4_addrs_<ifn>.
 - ru's -mdoc sweep
 - bring in documentation of NOAUTO
 - remove obsolete documentation of dead removable_interfaces

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase